Charles a



(No Modef.)

C. A. HUSSEY.

ELECTRIC ARG LAMP.

No. 269,939. Patented Jan.2,18831 UNITED STATES CHARLESA. HUSSEY, OF NEW YORK, N. Y., ASSIGNOR TO THE HUSSEY ELECTRIC COMPANY, OF SAME PLACE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 269,939, dated January 2, 183.

(No model.)

ment of the clamping-pieces, so as to cause them to act upon said rod.

The improvement also consists in other features, hereinafter described'and claimed.

In the accom Janvin drawin s Figure l is u i b a sectional elevation ot' an electric lamp embodying the improvement. Fig. 2 is a vertical section of certain parts ot' the same, taken in a plane at right angles to Fig. 1; and Fig. 3 is a horizontal section of the saine.

Similar letters of reference designate corresponding parts in all the figures.

A designates the upper carbon, and B designates the lower carbon. They are both detachably secured in metal holders, the lower of which has adjacent to it a globe-holder, C. 'lhc holder of the upper carbon is connected to a metal rod, D, which extends up through a metal case, E. The lamp is suspended by two metallic rods, F F', to which the line-wires are fastened. 4These rods are insulated from the case E by gaskets of hard rubber, a, and secured to metal plugs b, which extend up through the top ot' the case.

E E2 designate rods (shown as of tubular form) extending' downwardly from the case E, andsupportingthelower-carbon holder. These rods are insulated from the oase E by gaskets A e of hard rubber.

the wire c2, or the plug b oi' the rod F.

F. This is them'ain circuitof the lamp. The core G of the solenoid consists ot an annular piece of metal, andfits within the solenoid.

H designates a solenoid whose coil ot' wire is of higher resistance. It is arranged a little lower than the solenoid Gr, and receives thecore G outside it, the core G'1 inside it, and a con meeting-piece over its upper end. One end ot' its coil is connected by a wire, d, to the wire c, or the plug b ot' the rod F, and the other end thereof is connected by a wire, d', with It will therefore be seen that the solenoid H is in a derived circuit. Springs G2, acting on lugs extending from the core G, tend to force it upward. These springs may be compressed or relaxed by means ot' screws G3 to adjust the lamp for electric currents ot' different potentials.

I designate two clamping-plates, which are of the form of segments ot' a cylinder, and are adapted to grip the rod D. 'lhey are pivoted to arms J, which at the outer ends are pivoted to the cores G G4 of the solenoids. The upward motion of these clamping-plates is limited by stops K, attached to the cores G G", and their downward motion is limited by a stop or stops, L.

When an electric current is supplied to the lamp the solenoid G. is energized and raises the cores G G4. The arms J are thereby made to force the clamping-pieces on the rod D with a toggle-like. action, thereby locking the said rod and the upper carbon in position, and aconsiderable upward-and-downward movement ot' the arms is required to produce a compara` tively-slight movement ot' the clamping-pieces toward and from the rod to hold or release the latter. When the resistance in the main circuit is increased by the consumption of the carbons to a material extent the solenoid G becomes weakened, and as a greater quantity of the electric current is then forced into the derived circuit the solenoid Il becomes correspondinglystronger. ThecoresG/G4aretherefore caused to descend. X'Vhen the cores thus move the arms J, theclamping-pieces I, and the rod D descend with them until the said arms come in contact with the stops L. cores G GL descend farther the inner ends ot' the arms andthe clamping-pieces are caused to Then the IOO move through arc-shaped paths, and to thereby ielease the rod D. The rod D and the upper carbon then descend until the resistance in the main circuit is reduced to the normal amount. rIhis causes the amount of the electric current passi ng through the solenoid G to be increased. and the amount ofthe electric currentpassing through thesolenoid Hto be decreased. Hence the cores G G4 are then caused to more upward. The arms J are thereby caused to press the clamping-pieces against Vthe rod D with a toggle-like action and cause lthem to grip the rod and retain it in position. This operation is repeated as the resistance ot' the main cir cuit is caused to vary by the consumption ofthe carbons and the feeding of the upper carbon.

Preferably I combine with the t stops K springs K', which exert a constant tendency to depress the clamping-pieces. Screws litted to the stops may be used to act on the clamping-pieces, ifdesirable, in lieu ot' the springs.

lt will be seen that by my improvement I produce. a very simple and desirable clutch for controlling the feed of the upper carbon of an electric la mp.

Where but one lamp is to be arranged in a circuit, I may use one solenoid only, arranged in the main circuit, to operate the clampingpieces. The core would then descend by its gravity.

It is not absolutely necessary that the arms J should be pivoted to the clamping-pieces. The arms and clamping-pieces may be rigidly connected, it' desirable.

rlhe core G' ofthe solenoid G is made oi' cylindric or tubular form, and the core G4 ofthe solenoid His oi'similar r'orin, but much smaller. The two cores are connected by a. piece ot' magnetic or diamagnelic material.

lVhat I claim as myinvention, and desire to secure by Letters Patent, is-

l. In an electric lamp, the combination, with a rod sup porting a carbon, of clam ping-pieces, an electro-magnet or solenoid, an armature or core therefor, arms pivoted at one end directly to said armature or core, and Apivoted at the other end to said clamping-pieces, and stops for limiting the upward movementot'the clamping-pieces, so as to cause them to act upon said rod, substantially as specilied.

2. In an electric lamp, the combination, with the rod D, ot' the clam ping-pieces I, the arms J, the solenoid G, the core vG therefor, and the stops K L, substantially as specified.

3. In an electric lamp, the combination, with a rod for supporting acarbon, and a clutch or locking` device for said rod, of two solenoids,

Aarianged one within the other, and located,

one in a main circuit and the other in a derived circuit, and cores for said solcnoids, consisting of two cylindric or tubular pieces and a connecting-piece, substantially as specified. 4L. In an electric lamp, the combination, with a rod for supporting ay carbon, and a clutch for engaging with said rod, ot' two solenoids, arranged one within the other, and located, one in a main circuit and the other in a derived circuit, and cores i'or said solenoids, consisting ot' two cylindric or tubular pieces and a connecting-nece oi' diamagnetic material, substantially as specified.

O. A. HUSSEY.

Witnesses: y

T. J. KEANE,

JAMES It. BOWEN. 

